Metal screw closures for packaging containers

A screw closure for a container having a mouth comprising a metal closure body having a closure panel adapted to overlie a mouth of a container and a skirt which is peripherally attached to the closure panel and extends to a free edge, the skirt having a generally cylindrical region interiorly provided with a screw thread for engagement with a container, an inward curl adjacent said cylindrical region which terminates at said free edge, said closure further including a plastic security ring having a top portion held captive by the curl and an integral bottom portion which has locking means projecting interiorly of the curl for preventing rotation of the closure by engagement with an associated container, the security ring having at least one line of weakening between said top and bottom portions along which said security ring is rupturable to enable the closure to be unscrewed from an associated container while leaving visible evidence of the rupture, said security ring being adapted to rupture by relative angular movement between said top and bottom portions, said closure skirt having a substantially radially directed annular shoulder disposed in axially spaced opposition to the inward curl for holding the top portion captive in a non-rotary manner, the top portion of the security ring being compressively engaged between the annular shoulder of the skirt and said curl, security ring top portion having a radially exterior annular lower shoulder portion which is received within the curl, a recess which defines an inner periphery of the security ring annular shoulder portion, and said free edge being disposed within said recess and making deforming engagement with the top portion of the security ring at a base of said recess.

A screw closure for a container having a mouth comprising a metal closure body having a closure panel adapted to overlie a mouth of a container and a skirt which is peripherally attached to the closure panel and extends to a free edge, the skirt having a generally cylindrical region interiorly provided with means for forming to a screw thread of an associated container, an inward curl adjacent said cylindrical region which terminates at said free edge, said closure further including a molded plastic security ring having a top portion held captive by the curl and an integral bottom portion which has a plurality of cirumferentially spaced and inwardly projecting integral teeth for preventing rotation of the closure by engagement with an associated container, the security ring having at least one line of weakening between said top and bottom portions along which said security ring is rupturable to enable the closure to be unscrewed from an associated container while leaving visible evidence of the rupture, said security ring being adapted to rupture by relative angular movement between said top and bottom portions, said closure skirt having a substantially radially directed annular shoulder disposed in axially spaced opposition to the inward curl for holding the top portion captive in a non-rotary manner, the top portion of the security ring being compressively engaged between the annular shoulder of the skirt and said curl, security ring top portion having molded in a lower surface thereof a recess which includes a base, a plurality of downwardly projecting integral formations spaced along said recess base, and said free edge being disposed within said recess and making deforming engagement with said plurality of downwardly projecting formations.

A screw closure for a container having a mouth comprising a metal closure body having a closure panel adapted to overlie a mouth of a container and a skirt which is peripherally attached to the closure panel and extends to a free edge, said skirt having a generally cylindrical region interiorly provided with means for conforming to a screw thread of an associated container, an inward curl adjacent said cylindrical region which terminates at said free edge, the closure further including a plastic security ring having a top portion held captive by the curl and an integral bottom portion, the security ring having at least one line of weakening between said top and bottom portions along which said security ring is rupturable to enable the closure to be unscrewed from an associated container while leaving visible evidence of the rupture, said closure skirt having a substantially radially directed annular shoulder disposed in axially spaced opposition to the inward curl for holding the top portion captive, the top portion of the security ring being compressively engaged between the annular shoulder of the skirt and said curl, said security ring top portion having a radially exterior annular lower shoulder portion which is received within the curl, a recess which defines an inner periphery of the security ring annular shoulder portion, and said free edge being disposed within said recess and making deforming engagement with the top portion of the security ring at a base of said recess.

A screw closure for a container having a mouth comprising a metal closure body having a closure panel adapted to overlie a mouth of a container and a skirt which is peripherally attached to the closure panel and extends to a free edge, the skirt having a generally cylindrical region interiorly provided with a screw thread for engagement with a container, an inward curl adjacent said cylindrical region which terminates at said free edge, said closure further including a plastic security ring having a top portion held captive by the curl and an integral bottom portion, the security ring having at least one line of weakening between said top and bottom portions along which said security ring is rupturable to enable the closure to be unscrewed from an associated container while leaving visible evidence of the rupture, said closure skirt having a substantially radially directed annular shoulder disposed in axially spaced opposition to the inward curl for holding the top portion captive, the top portion of the security ring being compressively engaged between the annular shoulder of the skirt and said curl, said security ring top portion having a radially exterior annular lower shoulder portion which is received within the curl, a recess which defines an inner periphery of the security ring annular shoulder portion, and said free edge being disposed within said recess and making deforming engagement with the top portion of the security ring at a base of said recess.

A screw closure for a container having a mouth comprising a metal closure body having a closure panel adapted to overlie a mouth of a container and a skirt which is peripherally attached to the closure panel and extends to a free edge, the skirt having a generally cylindrical region interiorly provided with means for conforming to a screw thread of an associated container, an inward curl adjacent said cylindrical region which terminates at said free edge, said closure further including a molded plastic security ring having a top portion held captive by the curl and an integral bottom portion, the security ring having at least one line of weakening between said top and bottom portions along which said security ring is rupturable to enable the closure to be unscrewed from an associated container while leaving visible evidence of the rupture, said closure skirt having a substantially radially directed annular shoulder disposed in axially spaced opposition to the inward curl for holding the top portion captive in a non-rotary manner, the top portion of the security ring being compressively engaged between the annular shoulder of the skirt and said curl, said security ring top portion having molded in a lower surface thereof a recess which includes a base, a plurality of downwardly projecting integral formations spaced along said recess base, and said free edge being disposed within said recess and making deforming engagement with said plurality of downwardly projecting formations.